For blacklisting there's no need to use an app just to avoid hearing it ring. You can just use a silent ringtone...just a blank audio file. Set a contact for blacklisting numbers and add every number you want to blacklist to that one contact.
However, then you still get missed call notifications and voice mail. I installed this small (190KB) blacklist app a week ago:
https://play.google.com/store/apps/details?id=com.vladlee.easyblacklist
...and I completely forgot about it until I was writing this post. I guess I haven't gotten a blacklisted call in the past week, or its logging doesn't work but its blacklisting does.
Nah mate i mean like set a tone for when people who arent in my contacts ring me :beer:
The response you got to this was to use a blacklisting app, but that's different. I know what you're asking for. I thought I had that set up before but now I can't remember how.
Ideally, there could be this setup:
1. Individual contacts with specified ringtones, obviously. This tells you exactly who is calling.
2. A default ringtone for all defined contacts. This tells you that somebody you know, but who is not special, is calling.
3. A default ringtone for numbers NOT in your contact list that have caller ID info. This tells you that somebody you probably don't know is calling but they're probably not a telemarketer.
4. A default ringtone for numbers NOT in your contact list that do NOT have caller ID info. This tells you that you probably don't want to answer unless you're waiting for a call from an undefined number or you're bored.
5. And, of course, a blacklist for those ones you are sure that you never want to answer.
I hope someday ringtones happen in reverse... like YOU set the ringtone you want people to hear when you ring them
That would be awful, unless it was an opt-in system.
Hmm...actually, I suspect that one could create an app to do exactly that. Worst-case scenario, it could use VoIP like so many apps that let you make VoIP calls that don't cross over to the traditional telephone network.